Repairable gearing for looms.



.No. 674,600. Patented May 2|, I90I.

A. ..Cl-IEVRETTE.

B EPAIBABLE GEARING FOR LOOMS'.

(Application filed Jan. 10, 1901.)

(No Model.

NITED STATES ATENT FFIQEQ REPAIRABLE Gl E ARlNG FOR LOOMS.

SPECIFICATION formingpart of Letters Patent No. 674,600, dated May 21, 1901. Application filed January 10, 1901. Serial No. 42,710. (No modelfi To all whom it may concern.-

Be it known that I, AUGUSTIN OHEVRETTE, a citizen of the United States, residing at Fitchburg, in the county of Worcester and State of Massachusetts, have invented a new and useful Repairable Gearing for Looms, of which the following is a specification.

.This invention relates to that class of gearing which is employed for operating both the harness-motion and the box-motion of the Knowles loom; and the especial object of this invention is to improve the class of gearing referred to by providing a construction which can be readily repaired or renewed when worn by continuous operation without waste of material and without extensive alterations of the parts. To accomplish this result, thisinvention consists of the parts and combinations of parts as hereinafter described, and

more particularly pointed out in the claims at the end of this specification.

In the accompanying drawings, Figure 1 is a side view of sufficient parts of a loom-gearing to illustrate the application of my invention thereto. Fig. 2 is a fragmentary perspective view of one of the removable strips for reinforcing or repairing the initial tooth of one of the driving-segments, and Fig. 3 is an enlarged perspective view of one of the removable plates which are employed for repairing the pitman-gears.

In the ordinary type of Knowles looms, which are extensively employed throughout the country, the box-motion and harnessmotion are both controlled from a gearing comprising two oppositely-rotating driving segments or drums with a series of pitmangears arranged between them. The pitmangears are connected by links or rods to operate the harness-jacks or the box-motion of the 100m, as the case may be, and each pitman-gear is provided with teeth on portions only of its periphery. The pitman-gears are each mounted on a vibrating lever, so that one of its toothed sections will mesh with the teeth of an upper driving-segment when the pitman-gear is raised and so that its other toothed section will mesh with the teeth of the lower driving-segment when the same is lowered.

In the practical operation of this form of looingearing I have found that there is a heavy amount of wear on the initial teeth both of the pitman-gears and of the driving segments or drums, and on this account it frequently happens that looms have to be rebuilt and new driving-drums and pitmangears provided when only the initial teeth of said parts are worn out, the remaining teeth -on said parts being but slightly, if any, worn.

The especial object of my present invention is therefore to improve this class of gearing by providing a construction by means of which the initial teeth both of the driving segments or drums and of the pitman-gears may be renewed or replaced as frequently as may be req uisite Without requiring the renewal of such parts and without requiring the loomto be extensively dismantled for the purpose of making such repairs.

Referring to the accompanying drawings and in detail, A and O designate the oppositely-revolving driving sectors or drums. Extending between the drums A and O are the free ends of a series of pivoted levers D,

each one of which is provided with a pitmangear E, connected by a link F to operate a harness-jack, as G, or in other cases to operate the box-motion of the loom, as the case may be. These parts may be of the ordinary or approved construction, such as are now employed in the Knowles loom, except that the limit of the motion of the pitman-gear is determined by means of a specially-located stop 10, extending through a specially-located slot 11 in the gear.

In the gearing now employed in the Knowles loom the slot 11 is located in that part of the web of the gear between the initial teeth of the-gear and the stud on which it is mounted, whereas to apply my invention. to the gears the slot 11 is located in a different relative position, so as to leave a solid portion of the web of a gear to receive the detachable plate for carrying the initial teeth of the gear-that is to say, in a pitinan-gear ofa Knowles loom one toothed section cooperates with a drum turningin one direction and the other toothed section cooperates with a drum turning in the opposite direction. The initial teeth or the teeth which first go into mesh with said drums ICO are at the adjacent ends of the toothed portions of the gear. In these pitman-gears as heretofore constructed the slot .11 has been located, in part at least, within the sector bounded or inclosed by the radial lines of the initial teeth to the center of the gear, whereas to apply my invention thereto the slot 11 is located entirely outside of this sector.

As illustrated in Fig. 1, the initial teeth of the geared section of the pitman-gear E are at the lower side of the gear, so that when the lever D is depressed one of the initial teeth of the gear E will be brought down into position tobeengaged bytheinitialtooth ofthedrivingdrum 0, so as to impart a half-turn to the pitman-gear E and bring the initial tooth thereof in position, so that when the gear E is lifted it will be given a half'turn in the opposite direction by the driving-drum A.

In order to reinforce and provide for the ready repair of the initial tooth of each driving-drum A and C, I have provided said drums with removable strips 16, which may be fastened or riveted in place and which are provided with a rib or projection 17, forming half of the tooth, and in order to provide for repairing the pitman-gear E, I have provided the same with a removable plate 12, which may be held in place and riveted to the gear E by a rivet 13.

As shown most clearly in Fig. 3, the plate 12 carries the two teeth 14, which form the initial teeth of the toothed portions of the gear E, and with a reduced body portion 15, which is fitted into a socket or recess in the face of the gear. By means of this construction the driving-drums and pitman-gears of a loom may be readily repaired whenever the initial teeth thereof become worn, and this can be done without extensively dismantling or altering the loom.

I am aware that changes may be made in applying my invention to looms by those who are skilled in the art,and I do not'wish, therefore, tobe limited to the construction I have herein shown and described; but

What I do claim, and desire to secure by Letters Patent of the United States, is-

1. The combination of a pitman-gear of a loom having toothed sections on different portions of its periphery, and having a slot for receiving a stop to limit the motion of the gear, said slot being located in a portion of the gear outside of the sector inolosed between the radial lines of the initial teeth of the toothed sections of the gear so as to leave a continuous section of web therein, and a plate removably set into said continuous sec tion of the gear, and provided with the initial teeth of the toothed sections thereof, substantially as described.

2. The combination of a driving drum or sector for looms having teeth only around a portion of its periphery, and a plate removably fastened to said drum, and having a flange or rib forming part of the initial tooth of the toothed portion of said drum, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

AUGUSTIN CHEVRET'IE.

Witn esses:

LOUIS W. SOUTHGATE, PHILIP W. SOUTHGATE. 

